The game is published through the Apple App Store, Google Play Store, and Samsung Galaxy Store The forms of payment that is accepted is based the ones the app stores will allow in your country of residence. You may find more information on the different forms of payment that is available in the app stores.
- Apple App Store - https://support.apple.com/en-us/HT202631
- Google Play Store - https://support.google.com/googleplay/answer/2651410